function showhide(idtoshow,idtohide){

	if (document.getElementById){
	obj = document.getElementById(idtoshow);
		if (obj.style.display == "none"){
		obj.style.display = "";
	
		}
	obj = document.getElementById(idtohide);
		if (obj.style.display == ""){
		obj.style.display = "none";
		}
	}

}

function validRequired(formField,fieldLabel)
{
	var result = true;
	if (formField.value == "")
	{
			alert('Please enter a value for the "' + fieldLabel +'" field.');
			formField.focus();
			result = false;
	}
	return result;
}

function validateForm(theForm)
{
	// Customize these calls for your form -- Start
	if (!validRequired(theForm.participation_number,"participation number"))
			return false;
	if (!validRequired(theForm.product1,"Software product"))
			return false;
	// <--------- End
	return true;
}
 

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}